{
  "manageEntity": {
    "action": "Save",
    "entityId": "1663284157",
    "entityType": "Track",
    "nonce": "0x86aee24ff55e9e966f1afaf366be2f17d0385326aa901b4c94e3de6f1edfe4f0",
    "signature": "0xe26789111d999999f7c609089a070517bbff0fa376063a4c404defec597fc07514c9d8e61558873d2c77d6ef3a790bddf7bb815588764bdd00d8fd2584b9c4de1b",
    "signer": "0x98591a180A20DF036EB2C9D2c24B449E65939Df5",
    "userId": "338604526"
  }
}